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Long-term Potentiation

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When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.

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Related Experiment Video

Updated: Jun 19, 2026

A Method to Study Adaptation to Left-Right Reversed Audition

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Published on: October 29, 2018

Repeatedly experiencing the McGurk effect induces long-lasting changes in auditory speech perception.

John F Magnotti¹, Anastasia Lado¹, Yue Zhang²

¹Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.

Communications Psychology

|September 6, 2024

Summary

Repeatedly experiencing the McGurk effect for 14 days changes auditory speech perception. This fusion-induced recalibration (FIR) makes auditory speech alone evoke the fused percept, persisting long-term.

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Area of Science:

Cognitive Science
Neuroscience
Speech Perception

Background:

The McGurk effect demonstrates audiovisual speech integration, where conflicting auditory and visual cues create a novel percept.
Understanding the plasticity of speech perception is crucial for language acquisition and processing.

Purpose of the Study:

To investigate whether repeated exposure to the McGurk effect can induce lasting changes in auditory-only speech perception.
To characterize the nature and persistence of this induced perceptual change.

Main Methods:

Participants experienced the McGurk effect daily for 14 days.
Auditory-only speech perception was assessed before, during, and after the exposure period.
A causal inference model was used to predict individual differences in recalibration.

Main Results:

Repeated McGurk effect exposure led to fusion-induced recalibration (FIR), where auditory stimuli alone evoked the fused percept.
FIR was talker- and syllable-specific and persisted for over a year in some participants.
FIR was absent in participants who did not experience the McGurk effect, indicating it was driven by multisensory prediction error.

Conclusions:

The study demonstrates that multisensory experiences can induce persistent, long-lasting changes in auditory speech perception.
Fusion-induced recalibration highlights the dynamic nature of speech perception and its susceptibility to audiovisual integration.
These findings have implications for understanding neural plasticity in language networks and potential applications in language learning interventions.